How to Fix api-ms-win-crt-runtime-l1-1-0.dll Missing Error on Windows
If you are trying to launch a Windows application and you see an error message saying that api-ms-win-crt-runtime-l1-1-0.dll is missing from your computer, you are not alone. This is a common error that affects many Windows users and prevents them from running their programs properly. Fortunately, there are some easy ways to fix this error and restore the functionality of your applications. In this article, we will explain what api-ms-win-crt-runtime-l1-1-0.dll is, why it is important, what causes it to go missing, and how to fix it on Windows.
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What is api-ms-win-crt-runtime-l1-1-0.dll and why is it important?
To understand what api-ms-win-crt-runtime-l1-1-0.dll is, we need to first understand what DLL files are. DLL stands for Dynamic Link Library, and it is a type of file that contains code and resources that can be used by multiple programs at the same time. DLL files allow programs to share common functions and reduce the size and memory usage of the programs. For example, a program that needs to display a message box can use a DLL file that contains the code for creating and showing the message box, instead of writing its own code.
Api-ms-win-crt-runtime-l1-1-0.dll is one of the DLL files that belongs to the Microsoft Visual C++ Runtime Library. This library provides essential components and functions for many Windows applications that are built by using Microsoft Visual C++ tools. The api-ms-win-crt-runtime-l1-1-0.dll file contains code for basic runtime functions such as input/output operations, memory management, string manipulation, math operations, and more. Many programs depend on this file to run correctly.
The api-ms-win-crt-runtime-l1-1-0.dll missing error occurs when the program that needs this file cannot find it on your computer or when the file is corrupted or damaged. This can happen due to various reasons, such as:
Windows updates that overwrite or delete the file
Visual C++ Redistributable packages that are outdated or incompatible
System files that are corrupted or infected by malware
Programs that uninstall or overwrite the file
User errors that delete or move the file
When this error happens, you may see one of the following messages:
The program can't start because api-ms-win-crt-runtime-l1-1-0.dll is missing from your computer. Try reinstalling the program to fix this problem.
There was a problem starting with api-ms-win-crt-runtime-l1-1-0.dll. Reinstalling the program may fix this problem.
Api-ms-win-crt-runtime-l1-1-0.dll not found.
If you encounter any of these messages, don't panic. There are some simple methods that you can try to fix the error and get your programs working again.
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How to fix api-ms-win-crt-runtime-l1-1-0.dll missing error on Windows?
Depending on the cause of the error, you may need to try different methods to fix it. Here are some of the most common and effective methods that you can use:
Method 1: Install the latest Windows updates
One of the possible reasons for the error is that your Windows system is outdated or missing some critical updates that include the api-ms-win-crt-runtime-l1-1-0.dll file. To fix this, you can check for and install the latest Windows updates on your computer. Here are the steps to do this:
Press the Windows key + I to open the Settings app.
Click on Update & Security.
Click on Check for updates and wait for Windows to scan for available updates.
If there are any updates, click on Download and install to download and install them.
Restart your computer and see if the error is fixed.
Method 2: Install the Visual C++ Redistributable for Visual Studio
Another possible reason for the error is that your computer does not have the Visual C++ Redistributable for Visual Studio package that contains the api-ms-win-crt-runtime-l1-1-0.dll file. This package is a collection of runtime components and libraries that are required by many Windows applications that are built by using Visual C++ tools. To fix this, you can download and install the Visual C++ Redistributable for Visual Studio package from the official Microsoft website. Here are the steps to do this:
Go to and choose the version of Visual C++ Redistributable for Visual Studio that matches your system type (x86 or x64).
Click on Download and save the file to your computer.
Run the file and follow the instructions to install the package.
Restart your computer and see if the error is fixed.
Method 3: Run the System File Checker tool
A third possible reason for the error is that some of your system files are corrupted or damaged by malware or other factors. This can affect the functionality of the api-ms-win-crt-runtime-l1-1-0.dll file and cause it to go missing or malfunction. To fix this, you can run the System File Checker tool, which is a built-in utility that scans and repairs corrupted or missing system files on your computer. Here are the steps to do this:
Press the Windows key + X and choose Command Prompt (Admin) or PowerShell (Admin) from the menu.
Type sfc /scannow and press Enter to start the scan.
Wait for the scan to complete and see if it finds and fixes any issues.
Restart your computer and see if the error is fixed.
Method 4: Download and register the DLL file manually
A fourth possible reason for the error is that the api-ms-win-crt-runtime-l1-1-0.dll file is missing from your computer due to user errors or program uninstallations. To fix this, you can download and register the DLL file manually from a reliable source. However, this method is not recommended unless you are an advanced user, as it involves modifying your system registry, which can be risky if done incorrectly. Here are the steps to do this:
Go to and download the api-ms-win-crt-runtime-l1-1-0.dll file that matches your system type (x86 or x64).
Save the file to your computer and copy it to C:\Windows\System32 (for x86 systems) or C:\Windows\SysWOW64 (for x64 systems).
Press the Windows key + R and type regsvr32 api-ms-win-crt-runtime-l1-1-0.dll and press Enter to register the DLL file.
Restart your computer and see if the error is fixed.
Method 5: Scan your system for malware and viruses
A fifth possible reason for the error is that your computer is infected by malware or viruses that interfere with the api-ms-win-crt-runtime-l1-1-0.dll file and cause it to go missing or malfunction. To fix this, you can scan your system for malware and viruses using a reputable antivirus software and remove any threats that are detected. Here are the steps to do this:
Download and install a reliable antivirus software on your computer.
Run a full system scan and wait for the results.
If any malware or viruses are found, follow the instructions to quarantine or delete them.
Restart your computer and see if the error is fixed.
Conclusion
The api-ms-win-crt-runtime-l1-1-0.dll missing error is a common problem that affects many Windows users and prevents them from running their applications properly. However, it is not a difficult problem to solve, as there are some easy methods that you can try to fix it. In this article, we have explained what api-ms-win-crt-runtime-l1-1-0.dll is, why it is important, what causes it to go missing, and how to fix it on Windows. We hope that this article has helped you understand and resolve the error and enjoy your programs without any issues.
FAQs
Q1: Can I download api-ms-win-crt-runtime-l1-1-0.dll from a DLL download website?
A1: It is not recommended to download DLL files from third-party websites, as they may contain malware or viruses that can harm your computer. Moreover, they may not be compatible with your system or program and cause more problems. The best way to get the DLL file is to install the Windows updates or the Visual C++ Redistributable package that contains it.
Q2: How do I know which version of Visual C++ Redistributable I need to install?
A2: You can check the version of Visual C++ Redistributable that you need to install by looking at the name of the program that gives you the error. For example, if the program name is ProgramName.exe, you can right-click on it and choose Properties. Then, go to the Details tab and look at the Product version field. The number after the dot indicates the version of Visual C++ Redistributable that you need. For example, if the product version is 14.0.24215.1, you need Visual C++ Redistributable for Visual Studio 2015.
Q3: How do I run the System File Checker tool?
A3: You can run the System File Checker tool by following these steps:
Press the Windows key + X and choose Command Prompt (Admin) or PowerShell (Admin) from the menu.
Type sfc /scannow and press Enter to start the scan.
Wait for the scan to complete and see if it finds and fixes any issues.
Restart your computer and see if the error is fixed.
Q4: How do I register the DLL file manually?
A4: You can register the DLL file manually by following these steps:
Go to and download the api-ms-win-crt-runtime-l1-1-0.dll file that matches your system type (x86 or x64).
Save the file to your computer and copy it to C:\Windows\System32 (for x86 systems) or C:\Windows\SysWOW64 (for x64 systems).
Press the Windows key + R and type regsvr32 api-ms-win-crt-runtime-l1-1-0.dll and press Enter to register the DLL file.
Restart your computer and see if the error is fixed.
Q5: How do I scan my system for malware and viruses?
A5: You can scan your system for malware and viruses by following these steps:
Download and install a reliable antivirus software on your computer.
Run a full system scan and wait for the results.
If any malware or viruses are found, follow the instructions to quarantine or delete them.
Restart your computer and see if the error is fixed.
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